Quick disconnect coupling



FIG. 1 is a perspective view of a quick disconnect coupling showing our new design in assembled condition, the broken line showing of the infusion tubing is for illustrated purposes only and forms no part of the claimed design;

FIG. 2 is a front side elevation view thereof, the rear side elevation being a mirror image of the front side as shown;

FIG. 3 is a top plan view thereof, the bottom plan view being a mirror image of the top plan view as shown;

FIG. 4 is a left end elevation view thereof;

FIG. 5 is a right end elevation view thereof;

FIG. 6 is a perspective view thereof, with the male and female components shown in separated condition;

FIG. 7 is an inboard end elevation view of the male component of the quick disconnect coupling, taken along the line 7--7 of FIG. 6; and,

FIG. 8 is an inboard end elevation view of the female component, taken along the line 8--8 of FIG. 6. 

The ornamental design for a quick disconnect coupling, as shown and described. 